diff --git a/SurveyLib.Core/Services/ICompletionService.cs b/SurveyLib.Core/Services/ICompletionService.cs
index b6d4bab..ee68ef3 100644
--- a/SurveyLib.Core/Services/ICompletionService.cs
+++ b/SurveyLib.Core/Services/ICompletionService.cs
@@ -7,5 +7,6 @@ public interface ICompletionService
     Task AddCompletionAsync(Completion completion);
     Task UpdateCompletionAsync(Completion completion);
     Task DeleteCompletionAsync(int id);
+    Task<Completion> GetCompletionByIdAsync(int id);
     Task<IEnumerable<Completion>> GetCompletionsBySurveyIdAsync(int surveyId);
 }
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